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No. 514,719. 1 Patented Feb. 13,1894;

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I UNITED STATES PATENT -FFlCE.

oi-iAaLnsLEoN LIBBY, or BRIDGEPOR'I, CONNECTICUT, ASSIGNOR TO EDWARD P. BULLARD, OF SAME PLACE.

' BORING-MILL.

SPECIFICATION forming part of Letters Patent No. 514,719, dated February 13,1894. Applicetionfiled December 5,1892. Serial No. 454,121. (NomodeL) To all whom it may concern.-

Be it known that I, CHARLES LEON LIBBY, a citizen of the United States,residing atBridgeport, in'the county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in Boring-Mills; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to vertical turret head boring mills, and consists in certain novel and useful improvements calculated to enlarge the scope of machines of this class, among which may be mentioned a screw-threading attachment, an improvement in the tool-feeding mechanism, an automatic horizontal, as well as an independent vertical feed, and an improved automatic shipping device for the same.

My invention further consists and resides in the construction and combination of cooperating elements hereinafter to be more fully described and then recited in the claims which are hereunto annexed.

To more fully understand my invention, reference is had to the accompanying drawings in which similar figures of reference indicate like parts.

Figure 1, represents a front elevation of a boring mill with my improvements attached thereto. Fig. 2,is a side elevation of the machine; Fig. 3, a top plan of the same on the line 00-00 of Fig. 2, showing the revoluble table, bed, and cone-driving pulley for the table and feeding mechanism. Fig. 4, is an enlarged front elevation of the saddle, the turret slide operatively attached thereto, with the tool-turret and its post detached therefrom. Fig. 5, is an enlarged vertical section of the'saddle,tool-holdin'g and feeding mech- ELHlSlXl attached thereto, cross rail, shipper bar, and horizontal feed screw on line y-y of Fig. 1. Fig. 6, is a detail section through line zz of Fig. 5. Fig. 7, is an enlarged end elevation of the cross-rail, feed-gearing frame attached to the back thereof, and broken view of the vertical driving shaft. Fig. 8, is a sectional elevation of the clutch mechanismtaken on line 10 of Figs. 7 and 11, see also Fig.

i 10, for operating both the vertical and horizontal feeds.

Fig. 9, is a broken sectional side view of the horizontal feed clutch shown in Fig. 8. Fig. 10, is an enlarged rear elevation, looking in the direction of the arrow in Figs. 2 and 7, showing the mechanism for operating and controlling the feed. Fig. 11, is a vertical central section through line 'u-v of Figs 8 and 10, looking in direction of the arrows. It will be seen that-this section is cut at right angles to that of Fig. 8. Fig. 12, is a 1 is the base of the machine; 2 revoluble table driven by the back-geared cone pulley 3, as is customary in machines of this class; 4 uprights projecting from the bed for supporting the cross-rail 5 upon which it is vertically adjusted by means of the screws 6 in a manner too well known to need detail de-- scription.

7 is the saddle mounted upon the cross-rail 5,and is horizontally operated thereon, either automatically or byhand, as may be required, by means of the threaded feed-shaft 8 journaled in said cross-head,'engaging with the lug 1 of the saddle.

Referring more particularly to Figs. 4 and 5, 9 represents the swivel plate journaled upon the boss or projection 10 of the saddle 7, (see Fig. 6) and it is firmly held in any position thereon by ineansof the bolts 11 whose 14 is a post having a hole therethrough to admit if need be, the shank of the tool. The threaded stud 15 thereof is firmly screwed into the flanged bushing 16 seated in the shouldered hole 17 (see Fig. 4c) of plate 13.

Turret head 18 is mounted upon the center post 14 and also by means of its recessed rear portion upon the central raised projection 19 of the circular recess 20 of the turret slide, and is maintained on the center post by means of the washer 21 and nut 22 on the center stud 23. The turret head 18 hasthe holes 24 therethrough of equal size with the tool shank hole in the post 14. Other tool shank holes are provided in the turret head 18 and at right angles to holes 24. The tools are held firmly in place by means of the clamping screws 25 engagingtheshanksthereof. Thethreadedhandle lever 26 mounted on the threaded end of stud 23 in connection with the spider clamp 27, will hold the turret head 18 firmly against its seat on the turret slide 13. The sprin g-lockin g bolt28 in the recess 29 of the turret slide plate 13 and which is operated by the handle lever 30, registers with notches 31 suitably arranged about the periphery of the turret head 18, securely locking said turret head and thus maintain any tool or boring bar in position. Journaled in the lugs 32 of the turret slide 13 is the vertically feeding screw 33 upon whose upper end is mounted worm gear 34 engaging with the short worm shaft 35 whose threadless portion is journaled in the slide plate 13, as seen at Fig. 6, and whose outer squared end 36 is adapted to receive a wrench by means of which the slide plate is loosely adjusted by hand. The automatic feeding of such plate is by means of the bevel gears 37, 38 and 39 engaging with gear 40 mounted upon the vertical feed shaft 41, which shaft is journaled in the cross-rail 5, and may be provided with a gear upon its outer end (see dotted lines Fig. 7) to be engaged by large gear 94,which is driven by intermediate gears from gear 73-upon the clutch shaft. The long hub 42 of gear 37 is journaled in the flanged bushing 43 of the carrier block 44, which block is firmly secured to the swivel plate 9. The nut 45 mounted upon the threaded end of the gear hub 42, together with the washers 46 interposed between said nut, gear 37, and flanges of bushing 43, will serve to eliminate the play in said gear, and at the same time permit it to revolve freely. The stud 47 supports the gears 38 and 39 while the long hub of the former is journaled in the saddle 7. The radial movement or throw of the swivel plate 9 about its central support is effected, as usual in such cases, by means of Worm 48 on shaft 49 engaging the toothed periphery of saddle 7. The rope 49 from which is suspended the weight 50 (see also Fig. 1), passes over pulley 51 of upright 52, pulleys 53 of supports 54, and pulley 55 of the turret slide plate 13, and is attached to the upright 56 as shown. This arrangement of the weight 50 operates as a counterbalance for the turret slide 13, and by so doing will relieve the screw 33 of an excess of friction incidental to an unbalanced slide. The power for operating both the vertical and cross feed mechanism is derived from the cone pulley 3 shown in Fig. 3, and is transmitted through the several intermediate gears 57, 58 and 59, as seen at Fig. 2, to the gear 60 mounted on the lower end of the shaft 61. Such lower end is also journaled in the bracket 62 of the machine bed. The upper end of the driving shaft 61 is journaled in the bracket 62*, see Fig. 11, and is held therein by the collars 63. Shaft 61, is at all times driven in one direction, and having splined to it the sleeve 64, through which power is communicated to the above mentioned gear 78, by 65, or 66: it will readily be understood that the direction in which shaft 74 is driven will depend upon which of the gears clutch sleeve 64 is engaged with, in one instance it will drive the machine forward, feeding the vertical tool feed or the lateral feed of saddle 7, upon the rail 5, while in the other case the movements will be reversed. Said shaft 61, is a driving shaft. from which both the cross feed and vertical or tool feed derives its power, the same is transmitted through bevel gears, 65, or 66, and 73, clutch shaft 74 and its clutch mechanism, as clearly appears in Fig. 8. The purpose of this clutch device is, to transmit power to the feeds, through the train of gear belonging to gear 79, or to gear 80, from one an increased speed is derived, while with the other a reduced speed is gotten.

The clutch sleeve 64 is arranged to be operated eit her automatically or by hand. With the former method by means of the shipper rod 67 operatively mounted in the brackets 62 and having a shipper toe 68 engaging with said sleeve, an operation thatwill hereinafter be more fully described. The shipper handle 69 connected to shaft 70 journaled in the housing 71 to which is also attached the shipper toe 72, operates the clutch mechanism by hand. The power for the lateral feed of the saddle 7 is also derived from shaft 61 through the medium of the large bevel gear 73, as seen at Fig. 8. The short clutch shaft- 74 carrying the gear 73, is partially journaled in the hub 75 of the housing 71, while its outer end is also supported in the bracket 76 through the medium of the hub portion 77 and 78 of the loosely mounted clutch gears 79 and 80. The clutch sleeve 81 is attached to the shaft 74, a portion of which is broken away, and to the rod 82 by pin 82, which rod is loosely supported to a hole drilled in the end of shaft 74. The round end 83 of said rod forms, together with the handle 84, (see also Fig. 7) a ball'joint connection, by means of which said rod is operated to engage the clutching device of the sleeve 81 with the clutching faces provided on the end of the ICC gear hubs 77 and 78, as seen at Figs. 8 and 9.

The horizontal feed shaft 8 which operates the saddle 7,and the rod 41 for vertically operating the turret slide 13, are both operated to feed in either direction by means of the arrangement just described of the feed clutch mechanism attached to shaft 61 and may be .gear 89 which is brought into register with thelvarioussized gears as shown in dotted lines that may be placed upon the stud 90, which carries a pinion 92, said pinion meshing with a large gear-'94, which may drive either feed shaft through small gear upon their ends. The small gear 79 on the clutch shaft 74, as seen at Figs. 8 and 10, registers with gear 96 on the stud 97 secured to bracket 98. The gear 96 is arranged to register with gears that may be mounted on the stud 91 which, as before mentioned, also supports gear 93 on the opposite side of the bearing 99; said gear meshing with the before mentioned large gear 94 which drives the feed shafts. I

In the arrangement and combination of the clutching mechanism with the gears as above described, it will readily be seen that forward and reverse motions may be imparted to either the horizontal or vertical feed shafts for ordinary work,including both boring and turning, one train of gears may be used for boring or turning, while the other is preferably used for screw cutting. The slow'speed is usually used for screw cutting while the foot feed is mostly used for boring or turning.

Referring now to Figs. 4, 6, 11 and 13, for a more detailed description of the vertical feed, 100 is a toothed are or segment adapted to operate in the circular recess 101 of the saddle 7 (see also Fig. 4). v The stud 102 (see Fig. 13) rigidly attached to the back of the arc 100,engages the forked arm 103 on the rock shaft 104. Arm 105 alsomounted on this shaft (see Figs. 2, 10 and 1 1) is pivotally connected by means of a lever 67 a to the shipper rod 67, and this rod, as previously mentioned, to the clutching mechanism situated immediately below. The pinion shaft 106 (see Figs. 4 and 13) journaled in the swivel plate 9 whose toothed end engages the toothed are 100, has upon its outer end the crank handle 107 and the anti-friction roller 108 mounted upon a stud in the end thereof. Upon the edge of the slide 13 is adjustably secured the shipping dog 109 which when brought in contact with the roll arm 107 by the descending slide 13, will actuate both pinion shaft and are, and by means of the interposed mechanism before mentioned, disengage the clutch mechanism on the driving shaft 61.

The operation of my machine for the boring of a large tapering hole, say twenty-four inches in diameter, would be as follows. The operator would place the stock to be bored upon the revolving table; would then insert the proper tool in the turret head, make the necessary adjustments of the several parts of -tion.

the machine, including aslight radial movement of plate 9. Beginning with the tool at the outer edge of the hole, say twelve inches from the center of the revolving table, the operator would next manipulate the handle 69 thereby throwing the clutch sleeve 64 into engagement with bevel pinion upon shaft 74,

power would from this be communicated through either train of gears, connected with pinion 79, or with that of pinion 80, according to the speed desired, thence to large gear 94, from this to the feed shafts 8. The movements of the saddle 7 and the parts carried thereon would be fed toward the center by means of said shaft. Shipping dog 109, would.

be suitably adjusted upon slide 13 so that when the tool had reached the center of the hole, said shipping-dog would engage crank handle 107 and through its connection of tripping rod 104, &c., thereby throwing the upper portion of the machine out of operation. The operator would then by means of a further manipulation of handle 69 reverse the movement of the upper portion of the machine thereby carrying it back to its former posi- To make a second and deeper cut of the hole,the.operator would by means of a suitable wrench, placed upon the squared end of shaft 41, turn the same a distance equal to the depth of cut desired. Further 7 operation of the machine from this would be as before described and would be repeated as often as necessary to secure the required depth of the hole being bored. If the Operator desired to cut threads upon the inside or outside ofa cylinder, say twenty-four inches in diameter, he would insert in the turret head a suitable thread cutting tool having cutters upon its side; hewould disconnect the gear from shaft 8, and by means of a hand crank placed upon said shaft, would run the saddle to one side of the machine, so that the thread cutting tool would register with the periphery of the cylinder. For this operation only the vertical feed would be required.

It .will be seen from the foregoing that if I desire to use the cross feed, I simply place the gear upon the end of feed shaft 8, while if I desired to use the vertical feed, I place any desired position, all combined. with a rotatable table, enhances the value of this machine for the purpose for which it is intended.

Having thus fully described my invention,

what therefore I claim as new, and desire to secure by Letters Patent, is-

1. In a boring mill of the class described the combination of a cross rail havinga rock shaft suitably mounted in the ends thereof, of an arm 105 mounted upon said shaft and connected with lever 67 and a shipper rod connected with said lever and having mounted thereon a shipper toe, whereby movement is imparted from the rock shaft to the clutch mechanism, and means as shown for operating said shaft and whereby the movement of the feed is stopped, substantially as shown and described.

2. The combination in aboring mill having a cross rail and a saddle mounted thereon and a swivel plate carrying a slide, of a shipper dog mounted upon said slide adapted to engage a crank handle 107, of a pinion shaft, and a toothed arc, housed within said saddle and pivotally connected with a rock shaft, whereby movement is communicated to the clutch mechanism for the purpose of stopping the slide, substantially as and for the purpose set forth.

3. The combination in a boring mill having a vertically adjustable cross rail and feed shafts mounted therein, of pinions upon said shafts, a gear 94 meshing with said pinions, a pinion 93, stud 91 and idler mounted thereon, an idler 96 mounted upon a bracket- 98, clutch gear 79 of the shaft 74;, mechanism as shown for operatively connecting the gear with said shaft, rod 82 and lever 8 by which said clutch mechanism is operated substantially as and for the purpose specified.

4. The combination in a boring mill having a vertically adjustable cross rail and feed shafts mounted therein, of pinions upon said shafts, a gear 94 meshing with said pinions, a pinion 92, stud 90 and idler mounted thereon, a gear 89 meshing with said idler, a gear 80, shaft 74 and clutch mechanism operatively connecting the gear with the shaft and swivel plate 85 having a slot and stud whereby it is adjustably fixed with relation to the size of idler employed, all substantially as and for the purpose set forth.

5. In a boring mill the combination with a cross rail carrying apai r of driving shafts, of a vertical driving shaft 61 mounted in brack' ets on said cross rail, a pair of double clutch pinions 65 and loosely mounted on said shaft, a clutch sleeve splined to said shaft and adapted to engage the clutch pinions, a

shipper toe and lever whereby said clutch may be operated, a bevel gear 73 meshing with gears and 66, its shaft 7-1, a gear 79 upon said shaft and mechanism as shown connecting the latter with the shafts of the cross rail, the whole arranged and adapted to operate as and for the purpose set forth.

6. In a boring mill, the combination with the bed, rotatable work-su pportingtable, cross rail and tool-carrying mechanism thereon, of the driving shaft 61 journaled to the bed and to the cross rail substantially as shown, having gears 65 and 66 journaled thereon, clutch sleeve 6% arranged to operate therewith as shown, shaft 74, gears 79 and 80, journaled thereon, fixed gear 7 3 engaging with the said gears of the driving shaft, clutch-operating device on the shaft 74E to engage the same with the driving shaft substantially as shown, intermediate gears to connect gears 79 and 80 with the feeding shafts of the cross rail, and turret slide, and means for operating the said clutch device by hand, all arranged substantially as set forth.

7. In aboringmill,the combination with the cross rail, its saddle, swivel plate, turret slide and feed screw therefor, all arranged to operate substantially as shown, of a toothed are within a recess and a pinion engaging therewith, and means on the turret slide to operate said pinion and are, and the mechanism connecting the latter with the driving shaft to stop further travel of the slide, substantially as specified.

8. The combination in a boring mill, of the turret slide, a toothed are and its pinion arranged to operate substantially as shown, of a rock shaft connected with said are, a ship per rod also connecting said rock shaft with the clutch sleeve of the reversible mechanism of the driving shaft, and means on said tool-holding slide to release the same from the driving mechanism, substantially as arranged and described.

In testimony whereofl afiix my signature in presence of two witnesses.

CHARLES LEON LIBBY.

Witnesses:

A. J. TANNER, M. C. HINCHOLIFFE. 

